RM35X0E _58 Vehicle Interior _078378 THEFT DETERRENT / KEYLESS ENTRY _0388156 THEFT DETERRENT SYSTEM J

THEFT DETERRENT / KEYLESS ENTRY  THEFT DETERRENT SYSTEM  Security Horn Circuit  


DESCRIPTION

When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the security horn to sound at intervals of 0.4 seconds.

WIRING DIAGRAM

B530645E02
0.219,0.917 1.083,1.333 0.865,0.417 10 false from Battery 1.448,1.125 2.406,1.354 0.958,0.229 10 false S-HORN 2.031,0.802 2.167,0.99 0.135,0.188 10 false 1 2.052,1.479 2.188,1.667 0.135,0.188 10 false 5 1.865,1.833 3.375,2.302 1.51,0.469 10 false Security Warning Relay (SECURITY HORN) 3.021,0.823 3.156,1.01 0.135,0.188 10 false 2 3.021,1.49 3.156,1.677 0.135,0.188 10 false 3 3.948,0.854 4.25,1.063 0.302,0.208 10 false 26 4.083,1.5 4.385,1.708 0.302,0.208 10 false 3C 5.542,2.729 5.719,2.938 0.177,0.208 10 false A 5.583,0.854 5.802,1.073 0.219,0.219 10 false 29 5.844,0.979 6.156,1.177 0.313,0.198 10 false SH 4.083,1.719 5.74,2.063 1.656,0.344 10 false Instrument Panel Junction Block Assembly 5.51,2.927 7.156,3.281 1.646,0.354 10 false Main Body ECU (Multiplex Network Body ECU) 2.271,2.76 2.635,2.969 0.365,0.208 10 false A10 2.271,2.948 3.865,3.167 1.594,0.219 10 false Security Horn Assembly 1.792,2.49 1.927,2.677 0.135,0.188 10 false 1

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

w/ Entry and Start System:

If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.



PROCEDURE

1.PERFORM ACTIVE TEST USING GTS (SECURITY HORN)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Main Body / Active Test.


e.

According to the display on the GTS, perform the Active Test.

Body Electrical > Main Body > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Security Horn Security horn assembly ON or OFF -
Body Electrical > Main Body > Active Test
Tester Display
Security Horn
50004 123 20
OK:

The security horn assembly sounds and stops correctly when operated through the GTS.



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


NG

2.INSPECT SECURITY HORN ASSEMBLY
3.INSPECT SECURITY WARNING RELAY (SECURITY HORN)
a.
E270109E01
1.948,1.302 2.135,1.302 false 2.698,1.302 2.885,1.302 false 2.542,1.021 2.865,1.021 false 2.552,0.76 2.875,0.76 false 0.458,0.719 0.615,0.917 0.156,0.198 10 false 5 1.271,0.719 1.427,0.917 0.156,0.198 10 false 3 1.271,1.281 1.427,1.479 0.156,0.198 10 false 2 0.458,1.281 0.615,1.479 0.156,0.198 10 false 1 2.927,0.677 3.083,0.875 0.156,0.198 10 false 3 2.917,0.938 3.073,1.135 0.156,0.198 10 false 5 2.948,1.229 3.104,1.427 0.156,0.198 10 false 1 1.813,1.24 1.969,1.438 0.156,0.198 10 false 2

Remove the security warning relay (SECURITY HORN).


b.

Measure the resistance according to the value(s) in the table below

Standard Resistance:
Tester Connection Condition Specified Condition
Security warning relay (SECURITY HORN) terminal 3 - Security warning relay (SECURITY HORN) terminal 5 Battery voltage is applied between security warning relay (SECURITY HORN) terminals 2 - 1 Below 1 Ω
Security warning relay (SECURITY HORN) terminal 3 - Security warning relay (SECURITY HORN) terminal 5 Battery voltage is not applied between security warning relay (SECURITY HORN) terminals 2 - 1 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [SECURITY HORN] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

NG

REPLACE SECURITY WARNING RELAY (SECURITY HORN RELAY)

4.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [SECURITY HORN] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])
a.

Remove the main body ECU (multiplex network body ECU).

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


b.

Connect the instrument panel junction block assembly connectors.


c.

Remove the security warning relay (SECURITY HORN).


d.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
Security warning relay (SECURITY HORN) terminal 2 - A-29 (SH) Always Below 1 Ω
Security warning relay (SECURITY HORN) terminal 2 or A-29 (SH) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (BATTERY - SECURITY WARNING RELAY [SECURITY HORN])

NG

7.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [SECURITY HORN] - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
5.CHECK HARNESS AND CONNECTOR (BATTERY - SECURITY WARNING RELAY [SECURITY HORN])
a.
B341518C06
0.188,0.125 0.5,0.281 0.313,0.156 10 false *a
*a Front view of wire harness connector
(to Security Warning Relay [SECURITY HORN])


Remove the security warning relay (SECURITY HORN).


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
Security warning relay (SECURITY HORN) terminal 1 - Body ground Always 11 to 14 V
Security warning relay (SECURITY HORN) terminal 5 - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [SECURITY HORN] - SECURITY HORN ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [SECURITY HORN] - SECURITY HORN ASSEMBLY)
a.

Remove the security warning relay (SECURITY HORN).


b.

Disconnect the A10 security horn assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
Security warning relay (SECURITY HORN) terminal 3 - A10-1 Always Below 1 Ω
Security warning relay (SECURITY HORN) terminal 3 or A10-1 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [SECURITY HORN] - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
a.

Disconnect the 3C instrument panel junction block assembly connector.


b.

Remove the security warning relay (SECURITY HORN).


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
Security warning relay (SECURITY HORN) terminal 2 - 3C-26 Always Below 1 Ω
Security warning relay (SECURITY HORN) terminal 2 or 3C-26 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

for LHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for LHD)>REMOVAL

for RHD:

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU (for RHD)>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR